Diablo III is among the finest dungeon crawlers of recent years, but there has always been room for improvement.

Blizzard Entertainment took a step towards maximising the game's loot-harvesting potential when it shuttered its Auction House, ushering in a new era that coincides with the release of its first major expansion pack, Reaper of Souls.

Reaper of Souls does all of the things fans have come to expect from a Blizzard expansion, raising the level cap, introducing a new character class, an additional campaign act, and an extra mode of play.

The add-on doesn't attempt to reinvent the wheel, but gives Diablo III fanatics more of what they thrive on by the barrelful, and enriches the game in the way everyone was hoping it would.

Reaper of Souls introduces a formidable new foe to the Diablo universe in the shape of Malthael, an Angel of Death seeking to turn the tide in the war between heaven and hell by vanquishing humankind and adding the dead to his already-vast army.

The new character class of Crusader is a worthy addition to the fold. These holy warriors are all-rounders, equally adept in ranged and melee combat, and equipped with a few neat tricks up their sleeves.

Malthael, who serves as the antagonist in the new campaign chapter, is every inch a Diablo villain, terrifying in design and more than capable of giving your index finger a workout on that mouse clicker come the final confrontation.

The journey towards the Angel of Death is also vintage Diablo, with locations such as Westmarch and Pandemonium showing the third entry in the series at its darkest and most challenging.

Raising the level cap to 70 provides Diablo III enthusiasts with renewed incentive to hack and slash incessantly, as there are new active and passive skills for each class to unlock along the way.

The new character class of Crusader is a worthy addition to the fold. These holy warriors are all-rounders, equally adept in ranged and melee combat, and equipped with a few neat tricks up their sleeves.

They feel pleasingly weighty and tough, capable of mowing down hordes of demons, and standing their ground when defensive tactics are required. Players will also get plenty of mileage out of their ability to temporarily blind encroaching enemies.

The debuting Adventure mode is the feather in Reaper of Souls' cap, a shrewd inclusion that makes Diablo III's existing content all the more rewarding to replay.

Adventure mode, only accessible once you have defeated Malthael, introduces bounties to the game, scattered across its five acts.

These are essentially mini-quests, with objectives such as clear a dungeon or defeat a specific boss, that reward players with mountains of gold, experience and items, especially if you complete all five in a single act.

Completing bounties also yields items called rift keystone fragments, and when five of these have been gathered, players can open up a portal with a randomised dungeon on the other side.

These randomised levels are a mishmash of previous content from Diablo III, spliced together to make it feel fresh, but it's the sense of unpredictability that makes these stages a tantalising prospect.

Diablo III: Reaper of Souls offers little in the way of earth-shattering innovation, but the game is all the better for the new content it brings to the table.

Adventure mode and its bounties are exactly what Diablo III needed post-Auction House; an organic way for players to earn some of the best loot through hacking and slashing, and it fits into the equation like a missing jigsaw piece.

Reaper of Souls also provides a solution for players who aren't happy with an existing piece of loot or gear, with a new artisan known as the Mystic able to replace items with a randomly-generated substitute.

It's something of a lottery, but it can also alter the design of items for fashion-conscious players who simply must have the snazziest armor in all of Sanctuary.

Diablo III: Reaper of Souls offers little in the way of earth-shattering innovation, but the game is all the better for the new content it brings to the table.

While it's unlikely to convert players who were unconvinced by the core game, Diablo III fans will gleefully devour every last morsel it has to offer.